This doesn't help Black's position, although it's difficult to recommend active moves.
17. a2c1  17... e8g8  18. c1b3 The endgame is very unpleasant for Black. He doesn't have an active plan, and the d6-pawn will suffer pressure from a bishop on g3. The queenside overall is a bit shaky. 18... f8c8  19. f2g3 